"Clear and present danger" concept may not even be part of the first billionth of second of a thought inside an alien mind.
An interstellar body might consider that criterion in the defence of a less capable civilization against a more capable one.That would be true if a life, then becoming a 3 million year old civilization was forged from a defensive mechanism within a predatory environment. That scenario is the one life followed on this planet. That story is coded in our DNA. First Nature tried to wipe us all (just after creating us) many times over, so we don't trust Nature. Then we evolved not to trust each other as we became a tasty meal to each other. The interstellar body you are describing could very well be the one from our own making, based on our history, from the first mono cellular creature to us a 1000 years from now.
The game theory the cosmos is playing would predict the existence of a life born on a planet never hit once by killer asteroids like our planet. Maybe their planet had many small volcanoes but no super volcanoes. Maybe their planet is a moon, etc, etc. All those parameters would create a civilization that may not have a predisposition for conflict, war, doubt or the automatic suspicion of others. Maybe there consciousness is distributed across a coral like formation, or a forest.
If we are opening our mind to truly believe in any shape and form of life+consciousness we need to stop projecting our human nature across the universe as a divine substratum...
+1
Consciousness is NOT necessarily predicated on carbon, although carbon has huge advantages for creating creatures. Creature is not requisite for consciousness.
Given the obvious implications of that, I see two general alternatives - the universe is rich in consciousness, but it exists in "bubbles", around areas such as planets with the necessary element fractions to create it. In other words, it exists locally. Generally speaking this implies the speed of light is a limit on propagation of consciousness. In turn this means that the universe must be bigger than the areas which contain life or consciousness. Note a barren rock in vacuum with diverse minerals might be much more interesting as a home for consciousness than a lush forest.
